package cn.feng.thinkInJava.a1_7_复用类.reusing.a7_09_01;
//: reusing/SprinklerSystem.java

// Composition for code reuse.
class WaterSource
{
	private String s;
	
	WaterSource()
	{
		System.out.println("WaterSource()");
		s="Constructed";
	}
	
	public String toString()
	{
		return s;
	}
}

public class SprinklerSystem
{
	private String valve1,valve2,valve3,valve4;
	private WaterSource source=new WaterSource();
	private int i;
	private float f;
	
	public String toString()
	{
		return "valve1 = "+valve1+" "+"valve2 = "+valve2+" "+"valve3 = "+valve3+" "+"valve4 = "+valve4+"\n"+"i = "+i+" "+"f = "+f+" "+"source = "+source;
	}
	
	public static void main(String[] args)
	{
		SprinklerSystem sprinklers=new SprinklerSystem();
		System.out.println(sprinklers);
	}
} /* Output:
WaterSource()
valve1 = null valve2 = null valve3 = null valve4 = null
i = 0 f = 0.0 source = Constructed
*///:~
